Projecting-lantern.



R. BRIGHT, JR. & J. M. W. WRIGHT. PROJEGTING LANTERN.

APPLICATION FILED JUNE 1, 1909.

1,026,019. Patented May 14,1912.

3 SHEETS-SHEET 1.

R. BRIGHT, JR. 6: J. M. W. WRIGHT. PROJEGTIN G LANTERN. APPLICATION rum)JUNE 1, 1909.

1,026,011 9. Patented May 14,1912.

3 SHEETS-SHEET 2.

R. BRIGHT, JR. 6: J. W. WRIGHT. PROJEGTING LANTERN.

APPLICATION FILED JUNE 1, 1909.

' 1,026,01 9. Patented May 14, 1912.

3 SHEETS-SHEET 3.

UNITED STATES PATENT OFFICE.

ROBERT BRIGHT, JR, OF ABERDEEN, SCOTLAND, AND JOHN MORIGE WILSON WRIGHT,0F SUNDERLAND, ENGLAND.

PROJECTING-LANTERN.

Specification of Letters Patent.

Patented May 14, 1912.

Application filed June 1, 1909. Serial No. 499,442.

To all whom it may concern Be it known that we, ROBERT BRIGHT, Jr., andJ OHN MORICE WILSON WRIGHT, subj ects of the King of Great Britain andIreland, and residents of Aberdeen, Scotland, and Sunderland, England,respectively, have invented certain new and useful Improvements inProjecting-Lanterns, of which the following is a specification.

This invention relates to projecting lanterns or apparatus for producingscenic, signaling, advertising and other effects, and has specialreference to apparatus of the kind wherein a number of screens of thedesired colors or carrying the matter to be displayed are adapted to betraveled or moved in front and clear of the source of light as required,and it has for its object to provide improved simple and eflicient meansfor operating the screens.

According to this invention, we employ a suitably driven shaft or memberfrom which each screen is operated by suit-able mechanism adapted to berendered efiective and ineffective by an electromagnetic clutch.

We will fully describe our invention with reference to the accompanyingdrawings wherein- Figure 1 is an elevation partly'in section of alantern embodying one form of our improvements, and Fig. 2 an end viewof same. Fig. 3 is a plan of Fig. 1 partly in section, Fig. 4: is a partlongitudinal section illustrating a detail, and Fig. 5 is across-section on the line X Y in Fig. 1 looking to the right.

Referring to the drawings the lantern comprises a casing a having anopening 71 for the introduction of an electric arc lamp or othersuitable source of light, and an aperture 0 across which a number ofscreens 0? are adapted to be traveled in front of the light. The screens(Z are provided at one side with clips 6 adapted to slide on rods f, andat the other side with nuts 9 co-acting with screwed rods h adapted tobe rotated to travel the screens. On the end of an extension of eachscrewed rod hwe arrange aclutch the driving member j of which is looselymounted on the end of the rod h and is rotated thereon by screw or othersuitable gearing 7s and a shaft m driven by an electric motor a throughscrew or other suitable gearing 0. The driven member 39 of the clutch iskeyed to the end of the rod h and is adapted to be slid thereon toengage the member j by a pivoted arm g adapted to be attracted by anelectro-magnet r when the latter is energized. The arm 9 may be providedwith an adjustable screw 8 for engaging the clutch member 7).

Normally the electro-magnets r are not energized and the pivoted arms Qare supported by stops 6 and the clutch members 20 are kept out ofengagement with the driving members j by springs a (Fig. 1). When ascreen is to be operated the corresponding magnet 1' is energized andattracts its arm g which slides the clutch member 19 on the end of thescrewed rod h of the screen into engagement with the driving member j,and, on the shaft m being driven in the required direction by the motora, the screwed rod It is rotated to travel the screen. Thus it will beseen that any screen may be actuated at will by energizing thecorresponding magnet and driving the motor in the required direction.

What we claim and desire to secure by Letters Patent is k 1. Inprojecting lanterns the combination of a source of light, a screen,means for traveling said screen in front and clear of said source oflight, and an electro-magnetic clutch for rendering said traveling meansoperative and inoperative.

2. In projecting lanterns the combination of a source of light, aplurality of screens, a screw-andnut mechanism for traveling each ofsaid screens in front and clear of said source of light, means foractuating said screw-and-nut mechanism, electro-magnetic clutches forputting said actuating means into and out of gear with any of saidscrewand-nut mechanisms and means for selec tively actuating saidclutches.

In witness whereof, we have hereunto signed our names, in the presenceof the sub scribing witnesses.

ROBERT BRIGHT, JUNIOR. JOHN MORICE WILSON WRIGHT.

Witnesses to the signature of Robert Bright, Junior:

CHARLES HERBERT DACRE CHELL, HARRY LESLIE VVHITTAKER.

Witnesses to the signature of John Moricc Wilson Wright:

EDMUND WARD PATTISON, H. NIXON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

